Neb. Rev. Stat. §§ 32-614
The names of persons in the political party (1) who are presented by petition of their supporters to be party candidates for President of the United States or (2) who have been determined by the Secretary of State to be generally advocated or recognized as candidates in national news media throughout the United States shall be printed on the primary election ballot for the office of President of the United States. This section does not apply if the political party dissolves as provided in subsection (2) of section 32-720.
If a person does not want his or her name on the Nebraska primary election ballot, he or she shall, by March 10 of the presidential election year, execute and file an affidavit with the Secretary of State stating without qualification that he or she is not now and does not intend to become a candidate for office of President of the United States at the next presidential election in Nebraska or any other state. If a presidential candidate files such affidavit removing his or her name and subsequently becomes a presidential candidate in another state, the candidate's affidavit in Nebraska shall be purged and shall have no force and effect. The Secretary of State shall then place such candidate's name on the primary election ballot.
Neb. Rev. Stat. §§ 32-614